CVE-2026-56132
CVE-2026-56132: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityMedium6.9
Medium [CVE-2026-56132] Arbitrary Code Execution via Heap-based Buffer Overflow
CVE-2026-56132Source published Source updated
In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers. A flaw was found in libexpat, a library used for parsing XML data. An attacker could exploit a heap-based buffer overflow, a type of memory error, by providing specially crafted XML input. This vulnerability occurs when the library mishandles memory reallocation while processing XML, particularly when multiple parsers share data. Successful exploitation could allow the attacker to execute arbitrary code, access sensitive information, or cause the application to crash, leading to a denial of service. Red Hat severity: Moderate — CVSS 6.9 (CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L).…
- Affected products in this advisory
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Hardened Images
10 more entries in the full advisory.
- Source-reported affected versions
- < 2.8.2
- Source-reported fixed versions
- expat-0:2.7.3-1.el10_2.3
- expat-0:2.5.0-2.el8_10.2
- expat-0:2.5.0-6.el9_8.3
- expat-main-2.8.2-1.hum1
10 more entries in the full advisory.
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
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